| 摘要 |
PURPOSE: A synthetic lumber is provided to produce an external skin layer and an internal core layer by a co-extrusion method and vary the composition ratio of the core layer to the skin layer, thereby improving the weather-resistance of the skin layer and maintaining the quality of the appearance. CONSTITUTION: A synthetic lumber (10) block includes a core layer (20) including the woody component of 60 to 80% and a skin layer (30) forming the external surface by surrounding the core layer and including the woody component of 30 to 50%. The core layer includes the plastic component of 20 to 30%, and the skin layer includes the plastic component of 30 to 50%. The woody component, which is included in the core layer, has the length of 3 to 10mm and the diameter (D) of 0.2 to 1mm. |
